Python TkinterTreectrl drag items -

i writing program in python allow me browse through experimental data have taken, , view metadata associated experimental conditions each dataset.

at heart of program tkintertreectrl widget, wrapper tk treectrl

despite being rather novice programmer, far working - can add items, remove items, select them etc etc.

however, cannot work out how allow dragging of items new locations in tree. have found in documentation many references drag images, , @ moment can drag tantalizing dotted outline around. cannot find events generated on drag , drop. closest find in manual following set of events:

<drag-begin> <drag-receive> <drag-end>: generated whenever user drag-and-drops file             directory. event generated filelist-bindings.tcl             library code, not used default. 

i not know how use "filelist-bindings.tcl library code", not sure correct approach anyway.

in related query - thought 1 way solve , similar problems send every event generated treectrl widget stdout. there way this?

a minimal working example here rather large of use, excerpt may help:

    # add callbacks edit events      self.t.notify_install('<edit-begin>')     self.t.notify_bind('<edit-begin>', self.edit_begin)     self.t.notify_install('<edit-accept>')     self.t.notify_bind('<edit-accept>', self.edit_accept)     self.t.notify_install('<edit-end>')     self.t.notify_bind('<edit-end>', self.edit_end)      # add callbacks mouse clicks      self.t.bind('<button-1>', self.onleftclick)     self.t.bind('<button-3>', self.onrightclick)      # add callbacks drag events      self.t.notify_install('<drag-begin>')     self.t.bind('<drag-begin>', self.ondrag)     self.t.notify_install('<drag-recieve>')     self.t.bind('<drag-recieve>', self.ondrag)     self.t.notify_install('<drag-end>')     self.t.bind('<drag-end>', self.ondrag) 

callbacks edit events , mouse clicks work fine, attempting bind drag events generates _tkinter.tclerror: bad event type or keysym "drag"

ignoring fact question not newest 1 - there specific reason why use self.t.bind instead of self.t.notify_bind?

for me looks pretty point interface tktreecrtl michael not using wrapper functionality attempting directly bind <drag-begin> treectrl instance based on tkinter.widget

• source extract:

  class treectrl(tkinter.widget):

tkinter.widget has no possibility find '' event generated inside tktreectrl libraries.

bad event type or keysym "drag"

changing self.t.notify_bind should solve problem.